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CVE-2019-5544

OpenSLP as used in ESXi and the Horizon DaaS appliances has a heap overwrite issue. VMware has evaluated the severity of this issue to be in the...

Basic Information

CVE State
PUBLISHED
Reserved Date
January 07, 2019
Published Date
December 06, 2019
Last Updated
July 30, 2025
Vendor
VMware
Product
ESXi and Horizon DaaS
Description
OpenSLP as used in ESXi and the Horizon DaaS appliances has a heap overwrite issue. VMware has evaluated the severity of this issue to be in the Critical severity range with a maximum CVSSv3 base score of 9.8.
Tags
cisa malware ransomware nuclei_scanner

CVSS Scores

CVSS v3.1

9.8 - CRITICAL

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0

7.5

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

SSVC Information

Exploitation
active
Automatable
Yes
Technical Impact
total

Exploit Status

Exploited in the Wild
Yes (2021-11-03 00:00:00 UTC) Source
Proof of Concept Available
Yes (added 2020-12-01 13:49:26 UTC) Source
Used in Malware
Yes (added 2021-11-03 00:00:00 UTC) Source

References

http://www.vmware.com/security/advisories/VMSA-2019-0022.html http://www.openwall.com/lists/oss-security/2019/12/10/2 http://www.openwall.com/lists/oss-security/2019/12/11/2 https://access.redhat.com/errata/RHSA-2019:4240 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZPXXJZLPLAQULBCJVI5NNWZ3PGWXGXWG/ https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DA3LYAJ2NRKMOZLZOQNDJ5TNQRFMWGHF/ https://access.redhat.com/errata/RHSA-2020:0199 https://security.gentoo.org/glsa/202005-12

Known Exploited Vulnerability Information

Source Added Date
CISA 2021-11-03 00:00:00 UTC

Scanner Integrations

Scanner URL Date Detected
Nuclei https://github.com/projectdiscovery/nuclei-templates/blob/main/network/cves/2019/CVE-2019-5544.yaml 2025-07-20 11:00:17 UTC

Potential Proof of Concepts

Warning: These PoCs have not been tested and could contain malware. Use at your own risk.

HynekPetrak/CVE-2019-5544_CVE-2020-3992

Type: github • Created: 2020-12-01 13:49:26 UTC • Stars: 48

Python / scapy module implementing SRVLOC/SLP protocol and scans for enabled OpenSLP services.

Timeline

  • CVE ID Reserved

  • CVE Published to Public

  • Proof of Concept Exploit Available

  • Exploit Used in Malware

  • Added to KEVIntel

  • Detected by Nuclei